Door lock



N. B. HURD DOOR LOCK I Filed Jan. 26 1924 {NVENTOR Patented et. 28, 1924.

unirse armes ears Nr orties.

NORMAN n. HUND, or entrain, CONNECTICUT, AssrGNon To THE AMERICANA HARDWARE Con-roRATIoN, or New BRITAIN, CONNECTICUT, A CoNroRATiCN or CONNECTICUT.

f l Doon LOCK.

Application filed January 26, 1924. Serial No. `688.@47.

To @ZZ whom t may conce/Mi.' l

Be it ltnoivn that l. NonirAN Bldlono, a citizen of the United States of America, residing at Neivlritain, Connecticut, have iii-- vented new and useful .improvements in Door Locks, oi which the following is a specification.

My invention relates to door locks and latches, and consists in providing a new and improved form of clogging mechanismzfor the latch bolt and stop Work by which, when the door is closed and the stop wor; is on, the latch and stop VWork will be positively blocked against repression from the outside, and yet said latch may be retracted bythe proper means, such as aley for entrance from the outside, or by a knob on the inside of the door.` l i ln the aecompanyingl drawings@ Y.

Fig. 1 is a side-elevation of the lock and' latch mechanism with the cap removed.y

Fig'. 2 is a. front elevation. c

Fig. 3 is a section on the line ot Fig. 1.

Fig'. 4 is a section on the liney 4 4 'of Fig. 1. f

1 represents the usual face plate through which protrudes a spring latch bolt` 2. rl`he usual case is connected to the rear otthis face plate. 3-3a are the plungersof the socalled stop work by which tile roll-back ior the, outside knob may be dogged so that the door cannot be opened from the outside excepting' by means ot a suitable key- 4 represents a roll-bacl lorthe outside knob. 5 represents a key-controlled roll-back ordi-L narily carried by a cylinder loch` 6 at the outdoor side oi? the loch. represents the tail of the latch bolt 8 represents coil springl mounted freely on the latch bolttailand functionine` to normally press the latch 2 outwardly. 9 representsV a shoulder or abutment on the rear end oi the tail T. 1Gis the latch-retracting,- lever, pivoted at 11,'one end of said lever bearing against the abutment 9 and the other end being adapted for engagement by the key roll-back 5. 12 'is another lateh-retraeting lever, pivoted at 13. 14 is a. roll-back for operation by an indoor knob. Thisroll-back 14. as shown in Fig'. 1, usually overlies the roll-bach 4,' which latter is controlled by the outdoor knob. I have not shown the ordinary inner and outer knobs and the corresponding spin-A dles for coaction with the tivo rollbaclrs i y Cab lever 17 is pivoted at 18 and its lof-.ver ed and 14, since' such details are very Well knownand require no illustration. I

The stop-Workv plungers are of the conventional type and the same are connected Wille. in the lock rase by the'usual ivalliingbeam, so that when one plunger is pushed in, the other Willbepushed out. As shown in Fig. 1, the stop-work is in the on position, dogging the outer knob'roll-bacli 4; that is to say, the rear end of the plunger 3a has a nose 16 which projects into arecesslon the hub of the roll-back 4, thereby preventing it from? being turned'. Then the plunger 3 is pushed in, the plunger 3ak ivill'be moved out, so that.

the'nose 1G willbewithdraivn from` engagement With the roll-back 4, freeing thelalter. 17 is a clogging lever, which Jfunctions to dog the latch bolt 2 and the stopJvorlr'plunger 3 when saidlever standsrin the position shown in solid lines inlig. 1. This dog-ging rests upona pin 19 on the latch-retracting," lever 10. "filiere is anrincline on the lower, edge of thedogging; lever 17, to the rear of the 'pin k197 sothat 'when the lever 1U, swung bachy it Will quickly lift `the `chigging lever 17 to the dotted line position. .lt will be` observed that the forward end ot the clogging lever 17 is provided with tivofnoses 20K-21. The upper lnose 2O normally stands to the rear of kthe inner endet the plunger when the stop-Work is` on, while ythe nose 2'lat such a time standsftothe` rear of a lever 22 carried by the latch bolt 2. Hence, at such a time it Will be impossible to push Y autres in the button 3 or the latch 2 by employing,A c

torce againstr the outer end of either oitfthel same. The 'lever 22 is pivoted at 23 yin a.

slottedportion'- of the latch bolt y2. The

`outer end24 of the lever 22 is exposedon the beveled side of the latch bolt, and rnormally projects slightly abovethe beveled aee,.as seenin F 25 isa spring for holding the; said lever22 norinallyin the position indicated in/solid lines. The upper surface of' rthe inner end of the lever 22 is provided at one side with a beveled incline 26j Aivhiehineline, when the lever is tilted to the dotted line position indicated in Fig. 3, ivill be` positioned directly in front ofthe nose. This v permits the rlatch tofbe pushed back as` the door closes even if the stop-Work has been put conf For example, assuming the stopivorl; is 4on'and the door is closing.y As

llt)

it is just about vto close the outer .end 24 oit' the lever' 22 will encounter the edge 'ot the usual strike plate 27 and be repressed there-V vto the position indicated in dotted lines, and

this will servo to hold the clogging lever 17 elevated until the lat-1li bolt springs iorivard into said keeper opening` ot the strike plate whereupon the outer end ot thelcver 2a will release the clogging lever 177 which will then move down into the dogging position under the iniiuence oit' the spring28. 29 is the usual spring tor the latch retracting'lever 12. 30 is the usual Ycletent spring for the stop-ivork plungera which serves to trictiona-lly hold the stop-Work in the on or od position.

Operation-fille operation is plain from the above description. lhen the stop-'Work is off the inner end of the plunger 3 will stand under the nosev 20, of the clogging lever 17 holding they same in the non-clogging position, at. which Ytime the latch may be freely retracted by either the inner or outer door knob. lhenthe plunger 32L is pushed in, thedogging lever 17 dropsto the operative position, so that, such a time,

the door can be opened by the use of the inside knob, or by a rkey capable of operatingthe roll-back 5. It will be notedthat in effect aloop movement occurs between the rear end of the lever 22, and the end 21 of the clogging lever Whenever the clogging mechanism is on andthey lat-ch is retracted. By this movement the jamming and breakage of parts is avoided.,

I have shown my invention in, its pre# terred form but 'I aml aware that changes may be made Without avoiding the scope of the appended claims or the spirit of the invention. n

claim: f

1. In a door lock, a spring latch bolt, a knob-controlled roll-back and a key-controlled roll-back, both operable from the outdoor side ot said lock to retract said latch, fa stop-Work mechanism operable in one position to hold the said knob-controlled roll-back against movement, a clogging cle- Y the latch clogging position to permit the latch to berepressed by strike plate engagement as the door is closing.

2. In a door lock, a. spring latch bolt, a knob-controlled roll-back and a key-controlled roll-back, both operable from the outdoor side of said lock to retract said latch, a. stop-Work mechanism operable in one position to hold the said knob-controlled roll-back against movement, a clogging de-A vice to dog bo-th the latch and the stopivork when the latter is in said roll-back holding position, and a lever pivoted on the latch bolt, the inner end cosacting with said clogging device when in one position to block? the repression ot the latch, and lcoacting lwith said clogging device when in another position to move the latter outVv ot the latch clogging position to permitvthe.

latch to be repressed by strike plate engagement asthe door is closing, said .pivoted lever Vhaving a4 projection adjacent to the outer end of the latch tor engagement with the strike plate in advance of said latch.

3. In a' door lock, a spring latch bolt, a knob-controlled roll-back and a key-controlled roll-back, both operable from the outdoor side of said lock to retract said latch, a. stop-Work mechanism operable Yin one position to hold the said knob-controlled roll-back against movement, a clogging clevice to dogboth the latch and the stopivork when the latter is in said roll-back holding position, and a. lever pivoted on the latchbolt, the inner end cro-'acting with said clogging device when in one position to block the repression of the latch, and coacting With said clogging device when in another position to move the latter out ot the latch clogging position to permit the ylatch to be repressed byV strike plateengage- .ment as the door is closing, the inner end oit said lever having an incline on one sid@v of its upper face, saidy incline facing said clogging lever when the'door is closing and the strike plate is encountered.

NORMAN n. Hunn.y

Cri 

